function calcSrc() {
  SrcStr = "http://o-moskve.narod.ru/images/preview/p";
  RefStr = "http://o-moskve.narod.ru/p";
  SrcNum = Math.ceil(Math.random() * 57);
  SrcStr = SrcStr + SrcNum + "_1.jpg";
  RefStr = RefStr + SrcNum + ".html";
}

function changeSrc() {
  SrcStr = "http://o-moskve.narod.ru/images/preview/p";
  RefStr = "http://o-moskve.narod.ru/p";
  SrcNum = Math.ceil(Math.random() * 57);
  SrcStr = SrcStr + SrcNum + "_1.jpg";
  RefStr = RefStr + SrcNum + ".html";
  hiddenImg= new Image();
  hiddenImg.src = SrcStr;
  document.RndImg.src = hiddenImg.src;
  if(navigator.appName == 'Microsoft Internet Explorer')
  	document.links('RndRef').href = RefStr;
  else
  	document.links.RndRef.href = RefStr;
};

function hdrLoad() {
  RefStr = "headers/";
  RefNum = Math.ceil(Math.random() * 8);

  RefStr = RefStr + RefNum + ".html";
  var req = window.XMLHttpRequest? 
    new XMLHttpRequest() : 
    new ActiveXObject("Microsoft.XMLHTTP");
  req.onreadystatechange = function() {
    if (req.readyState == 4) 
	{
	  document.all['hdr'].innerHTML = unescape(req.responseText);
	}
  }
  req.open("GET", RefStr, true);
  req.send(null);
};